⚙️How Compilers Work

Follow source code on its full journey from raw characters to machine instructions. You will build intuition for each compiler phase — scanning, parsing, semantic analysis, and code generation — and understand why each exists, what can go wrong inside it, and how the phases connect. By the end you will be able to read compiler error messages with precision, write a toy expression evaluator, and reason about what your compiler is doing when you flip on -O2.